I wanted to be able to turn on and off my diesel heater that I have installed in my work shop remotely that way I can get it warmed up nicely prior to going out on really cold days. I was able to easily accomplish this using a wifi remote control device and the corresponding app.
You can buy the broadlink remote system here https://amzn.to/4gtrb1h
The diesel heater I used is this one https://amzn.to/3DtTXjQ
Amazon Paid Links
Aaron's Customs LLC 